Ensure that the AC input to the external power supply is disconnected before plugging in or
unplugging any connector. Ground the unit to minimize the possibility of static electricity
damage.
Refer to the following figures while configuring the hardware.
Figure 1. IC-3121 Power Connectors and Reset Button
SYSTEM
12-24 V
C V
ISO
5-24 V
2
3
1
4
C
ISO
V
ISO
1. Reset Button
2. System Power Connector
3. Isolated Outputs Power Connector
4. Chassis Grounding Screw
IC-3121 Getting Started Guide
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© National Instruments
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